MUM-039 Anal Development Taught as a Second Pussy with Rina

A meat stick is slipped into Rina's anus during what she is told is development, and the insertion is pushed to the root despite her screams. A rotor toy and the meat stick are used repeatedly, and the scene escalates until both holes are filled with thick sticks, leading to a new kind of climax. The developed anus is presented as another pussy.